494 



mon' s E. ramulosa (Meeresalg., p. 278) of which I have had a few 

 specimens for examination ought to be referred to this species, I 

 think it differs widely from the true E. ramulosa (= E. uncinata 



Mohr, E. spinescens Ki'Uz.). 



This species was found more particularly in shellered localities 

 in the interior of fjords and in shallow water, oflen intermingled 

 wilh olher species of Enteromorplm and forming large tangled masses. 



Found in the following localities: -- »Bordo«: Klaksvig (H. J. !); 

 Øst: the interior of Fundingsfjord(!); Str.: the interior ofKalbakfj ord (!); 

 Syd: Trangisvaagfjord (!). 



MONOSTROMA (Thur.). 



166. M. fuscum (Post. et Rupr.) Wittr. Rosenv. emend, Gronl. 

 Havalg., p. 940. 



This plant is subject to considerable variation in the size and 

 form of its cells, but, as pointed out by Rosen vinge (1. c), it is 

 characteristic and easily recognizable by its having 2 chromato- 

 phores one at each end of the cells; with regard to the definition 

 of this species I quite follow the opinion expressed in Rosen- 

 vinge 's description. 



This species generally grows in the sublittoral zone, but may 

 also occur in hollows between tide-marks; in the sublittoral zone 

 it is met with from a depth of at least 10 fathoms. 



It has been found both on open coasts and in sheltered situa- 

 tions in the interior of fjords. It grows sometimes on rocks and 

 on stony and gravelly bottoms, and sometimes as an epiphyte, 

 especially on the stems of Laminaria. 



It was observed from April to December, and is probably 

 perennial, as Ro sen vinge assumes to be the case along the 

 coasts of Greenland. 



Fruiting specimens were found in May, June, July and October. 



This species is very common along the coasts of the Færoes as 

 mentioned by Rostrup (1. c. p. 88), since the plant which he calls 

 Ulva j)lic<ilu is in reality this species, as has been proved by examining 

 the specimens in his herbarium. One among them was, indeed, a small 

 specimen of Ulva Lactuca-, on the olher hånd, Ulva plicata Lyngb. (Hy- 

 drophyt., ]). 30) must according to the few, very tiny examples preserved 

 in Lyngbye's Herbarium hc referred to M. Grevillci. 



The present species had, however, already been found by Lyng- 

 bye, as there is a small, but easily recognizable specimen of il in the 

 museum in Copenhagen; this was gathered near »Hojvig prope Thors- 

 havn' and called hy Lyngbye *Ulva mesenterlformis? an Lactuca«, 



